CN107245724A - Surface laser cleaning method before a kind of magnesium alloy workpiece weldering - Google Patents
Surface laser cleaning method before a kind of magnesium alloy workpiece weldering Download PDFInfo
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- CN107245724A CN107245724A CN201710478937.3A CN201710478937A CN107245724A CN 107245724 A CN107245724 A CN 107245724A CN 201710478937 A CN201710478937 A CN 201710478937A CN 107245724 A CN107245724 A CN 107245724A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
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Abstract
The invention discloses surface laser cleaning method before a kind of weldering of magnesium alloy workpiece, comprise the following steps：Assembling, position adjustments and the laser cleaning of laser cleaner, during laser cleaning（1）The laser power of pulse optical fiber is set as 100 200W, the 30ns of pulse width 20, the 30KHz of pulse frequency 20；Using one-dimensional vibration mirror scanning, the 4000mm/s of sweep speed 3000；It is 30mm to adjust laser beam flying line width；（2）Robot movement speed is set, and it is 10mm/s in the rate travel of workpiece surface to make laser rays hot spot；（3）Open the switch on filtrating smoke dust system and compressed air supply line；（4）Unbalanced pulse optical fiber laser, carries out laser cleaning, and the effect depending on cleaning repeatedly clean back and forth.By the above-mentioned means, surface laser cleaning method before magnesium alloy workpiece weldering of the present invention, using laser cleaning mode, improves in the cleaning efficiency and cleaning quality of surface film oxide before magnesium alloy weldering, cleaning process and does not hinder base material, improve cleaning site environment.
Description
Technical field
The present invention relates to laser cleaning technique field, surface laser cleaning side before more particularly to a kind of magnesium alloy workpiece weldering
Method.
Background technology
In order to prevent corrosion, magnesium alloy is both needed to carry out oxidation processes.What use was more at present is chromaking thin film-forming method, makes magnesium
Alloy workpiece is impregnated into the processing solution of chromic acid or bichromate etc., to make its surface form one layer of magnesia, oxygen
Change the oxide-film of chromium or chromate filling, thickness is usually 0.5~3 μm, and this layer of oxide-film is very fine and close, can effectively protect matrix
It is not corroded, but it is totally unfavorable to the welding of magnesium alloy workpiece.
The fusing point of magnesium alloy is relatively low, and oxide-film fusing point is then very high, and oxide-film can hinder the mobility in molten bath during welding, holds
Dreg defect is easily caused, the welding quality hidden danger such as incomplete fusion, lack of penetration, dry joint are produced, and oxide-film has also adsorbed more
Moisture, can promote weld seam to generate stomata during welding.Therefore, surface film oxide must thoroughly be removed before magnesium alloy weldering.
Conventional cleaning method has chemical method and Mechanical Method.
The treatment process of chemical method is：（1）Surface degreasing：Workpiece is immersed in NaOH, Na3PO4, Na2SiO3 mixing
In solution, 60-90 DEG C of temperature, time 5-15min；（2）Rinse：The clear water of 50-90 DEG C of temperature in use rinses alloy surface, time
4-5min, after at room temperature with flowing cool water rinse 2-3min；（3）Caustic corrosion：Workpiece is immersed in NaOH solution, temperature
60-65 DEG C, time 5-6min；（4）Rinse：Flowing hot water in rinse, 50-90 DEG C of temperature, time 2-3min, after at room temperature
2-3min is rinsed with flowing cool water；（5）Chromic acid is neutralized：Workpiece is immersed in CrO3 solution, room temperature, time 4-6min；（6）Punching
Wash：Rinsed in flowing cool water after 2-3min, 1-3min, 50-90 DEG C of temperature are rinsed in flowing hot water；（7）Dry：With drying
Hot blast dries up workpiece.
Mechanical Method treatment process is：Using the stainless steel wire brush of scraper or Φ 0.15~Φ 0.25mm diameters from positive and negative
Face is removed by debris in 25~30mm of weld metal zone and oxide-film.
Chemical method, Mechanical Method can effectively remove Mg alloy surface oxide-film, but chemical method process is more, less efficient,
The gas of generation has infringement to human body and environment；Mechanical Method is struck off can cause damage to Mg alloy surface, produce surface stress,
Welding quality can have an impact, while harm can also be produced to health by striking off the powder of generation.
Above-mentioned two classes cleaning method different degrees of presence itself the problem of, limit it and cleaned in Mg alloy surface and led
The large-scale promotion application in domain, in environmental requirement increasingly stricter today, needs badly and seeks a kind of green, efficient cleaning side
Method.
The content of the invention
The present invention solves the technical problem of surface laser cleaning method before a kind of magnesium alloy workpiece weldering is provided, simplify
Process, lifts operating efficiency, it is to avoid environmental pollution and the harm to human body.
In order to solve the above technical problems, one aspect of the present invention is：There is provided before a kind of magnesium alloy workpiece weldering
Surface laser cleaning method, comprises the following steps：
The assembling of laser cleaner：Using pulse optical fiber, compressed air supply line and filtrating smoke dust system, feel the pulse
Wash the cigarette in laser galvanometer head, the compressed-air atomizer on compressed air supply line and the filtrating smoke dust system of fibre laser off
Dirt filtration system suction nozzle is respectively mounted on a robotic arm, and laser galvanometer head is downwardly directed, compressed-air atomizer and filtrating smoke dust system
Suction nozzle of uniting is tilting in laser galvanometer head both sides；
Position adjustments：The position of laser galvanometer head is adjusted, makes the laser beam optical axis that it is projected and magnesium alloy workpiece surface to be cleaned
Angle in 90 °, while making laser beam foucing be located at magnesium alloy work-piece surface；The angle of compressed-air atomizer is adjusted, makes compression
Air nozzle points to laser beam foucing position, and the gas direction that compressed-air atomizer sprays and magnesium alloy workpiece are into 20 ~ 40 ° of folder
Angle；Adjust filtrating smoke dust system suction nozzle, filtrating smoke dust system suction nozzle is pointed to laser beam foucing position, and with magnesium alloy workpiece table
Face is into 30 ~ 60 ° of angle；
Laser cleaning：
（1）The laser power of pulse optical fiber is set as 100-200W, pulse width 20-30ns, pulse frequency 20-
30KHz；Using one-dimensional vibration mirror scanning, sweep speed 3000-4000mm/s；It is 30mm to adjust laser beam flying line width；
（2）Robot movement speed is set, and it is 10mm/s in the rate travel of workpiece surface to make laser rays hot spot；
（3）Open the switch on filtrating smoke dust system and compressed air supply line；
（4）Unbalanced pulse optical fiber laser, carries out laser cleaning, and the effect depending on cleaning repeatedly clean back and forth, until
The oxide-film of commissure all removes clean on magnesium alloy workpiece.
In a preferred embodiment of the present invention, the pulse optical fiber maximum average power is 200W, the pressure
The air mass flow of contracting air nozzle is 40-50L/min, the power 0.75KW of the filtrating smoke dust system.
In a preferred embodiment of the present invention, the laser galvanometer head, compressed-air atomizer and filtrating smoke dust system are inhaled
Mouth is located at same perpendicular.
In a preferred embodiment of the present invention, the perpendicular is parallel with cleaning direction.
In a preferred embodiment of the present invention, in the laser cleaning step, the laser of pulse optical fiber is set
Power is 150W, pulse width 25ns, pulse frequency 25KHz, sweep speed 3500mm/s.
In a preferred embodiment of the present invention, in the laser cleaning step, the laser of pulse optical fiber is set
Power is 100W, pulse width 20ns, pulse frequency 20KHz, sweep speed 3000mm/s.
In a preferred embodiment of the present invention, in the laser cleaning step, the laser of pulse optical fiber is set
Power is 200W, pulse width 30ns, pulse frequency 30KHz, sweep speed 4000mm/s.
The beneficial effects of the invention are as follows：Surface laser cleaning method before a kind of magnesium alloy workpiece weldering that the present invention is pointed out, is adopted
Laser cleaning mode is used, improves in the cleaning efficiency and cleaning quality of surface film oxide before magnesium alloy weldering, cleaning process and does not hinder base
Material, improves cleaning site environment, environmental protection.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is the structural representation of the preferred embodiment of surface laser cleaning method one before a kind of magnesium alloy workpiece weldering of the invention.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
Referring to Fig. 1, the embodiment of the present invention includes：
Surface laser cleaning method before a kind of magnesium alloy workpiece weldering, comprises the following steps：
The assembling of laser cleaner：Using pulse optical fiber, compressed air supply line and filtrating smoke dust system, feel the pulse
Wash off on the laser galvanometer first 1, the compressed-air atomizer 2 on compressed air supply line and filtrating smoke dust system of fibre laser
Filtrating smoke dust system suction nozzle 3 is respectively mounted on a robotic arm, and laser galvanometer first 1 is downwardly directed, compressed-air atomizer 2 and flue dust mistake
Filter system suction nozzle 3 is tilting in first 1 both sides of laser galvanometer, and the pulse optical fiber maximum average power is 200W, the pressure
The air mass flow of contracting air nozzle 2 is 40-50L/min, the power 0.75KW of the filtrating smoke dust system；
Position adjustments：The position of laser galvanometer first 1 is adjusted, makes the laser beam optical axis that it is projected and the table to be cleaned of magnesium alloy workpiece 4
Face angle in 90 °, while making laser beam foucing be located at the surface of magnesium alloy workpiece 4；The angle of compressed-air atomizer 2 is adjusted, is made
Compressed-air atomizer points to laser beam foucing position, the gas direction that compressed-air atomizer 2 sprays and magnesium alloy workpiece into 20 ~
40 ° of angle；Filtrating smoke dust system suction nozzle 3 is adjusted, filtrating smoke dust system suction nozzle 3 is pointed to laser beam foucing position, and and magnesium
Alloy workpiece surface is into 30 ~ 60 ° of angle, the laser galvanometer first 1, compressed-air atomizer 2 and filtrating smoke dust system suction nozzle 3
In same perpendicular, and the perpendicular is parallel with cleaning direction；
Laser cleaning：
（1）The laser power of pulse optical fiber is set as 100-200W, pulse width 20-30ns, pulse frequency 20-
30KHz；Using one-dimensional vibration mirror scanning, sweep speed 3000-4000mm/s；It is 30mm to adjust laser beam flying line width；
（2）Robot movement speed is set, and it is 10mm/s in the rate travel of workpiece surface to make laser rays hot spot；
（3）Open the switch on filtrating smoke dust system and compressed air supply line；
（4）Unbalanced pulse optical fiber laser, carries out laser cleaning, using oxide layer stripping of the laser magnesium alloy work-piece surface,
The gas that is sprayed using compressed-air atomizer blows off the oxide layer fragment of stripping magnesium alloy work-piece surface simultaneously, it is to avoid influence swashs
The follow-up work of light, it is ensured that laser work efficiency, the oxide layer fragment blown off sucks flue dust mistake using filtrating smoke dust system suction nozzle
Filter system, is conveniently focused on, it is ensured that the hygienic and environmental protection of work on the spot environment；
Effect depending on cleaning repeatedly clean back and forth, until the oxide-film whole removal of commissure is dry on magnesium alloy workpiece
Only.
Embodiment 1：
In the laser cleaning step, the laser power of pulse optical fiber is set as 150W, 150 W are generally used, and is applicable
In the cleaning of most oxide layer, pulse width 25ns, pulse frequency 25KHz, sweep speed 3500mm/s.
Embodiment 2：
In the laser cleaning step, the laser power of pulse optical fiber is set as 100W, depending on oxidated layer thickness, appropriate drop
The laser power of low pulse optical fiber, reduces energy consumption, pulse width 20ns, pulse frequency 20KHz, sweep speed
3000mm/s。
Embodiment 3：
In the laser cleaning step, the laser power of pulse optical fiber is set as 200W, opens peak power, cleaning speed
Degree is fast, lifts operating efficiency, pulse width 30ns, pulse frequency 30KHz, sweep speed 4000mm/s.
In summary, surface laser cleaning method before a kind of magnesium alloy workpiece weldering that the present invention is pointed out, reduces scavenger
Sequence, improves cleaning efficiency, and enterprise need not dispose waste liquid, and basic no material consumption loss, environmental protection improves cleaning environment,
Protect health.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (7)
1. surface laser cleaning method before a kind of magnesium alloy workpiece weldering, it is characterised in that comprise the following steps：
The assembling of laser cleaner：Using pulse optical fiber, compressed air supply line and filtrating smoke dust system, feel the pulse
Wash the cigarette in laser galvanometer head, the compressed-air atomizer on compressed air supply line and the filtrating smoke dust system of fibre laser off
Dirt filtration system suction nozzle is respectively mounted on a robotic arm, and laser galvanometer head is downwardly directed, compressed-air atomizer and filtrating smoke dust system
Suction nozzle of uniting is tilting in laser galvanometer head both sides；
Position adjustments：The position of laser galvanometer head is adjusted, makes the laser beam optical axis that it is projected and magnesium alloy workpiece surface to be cleaned
Angle in 90 °, while making laser beam foucing be located at magnesium alloy work-piece surface；The angle of compressed-air atomizer is adjusted, makes compression
Air nozzle points to laser beam foucing position, and the gas direction that compressed-air atomizer sprays and magnesium alloy workpiece are into 20 ~ 40 ° of folder
Angle；Adjust filtrating smoke dust system suction nozzle, filtrating smoke dust system suction nozzle is pointed to laser beam foucing position, and with magnesium alloy workpiece table
Face is into 30 ~ 60 ° of angle；
Laser cleaning：
（1）The laser power of pulse optical fiber is set as 100-200W, pulse width 20-30ns, pulse frequency 20-
30KHz；Using one-dimensional vibration mirror scanning, sweep speed 3000-4000mm/s；It is 30mm to adjust laser beam flying line width；
（2）Robot movement speed is set, and it is 10mm/s in the rate travel of workpiece surface to make laser rays hot spot；
（3）Open the switch on filtrating smoke dust system and compressed air supply line；
（4）Unbalanced pulse optical fiber laser, carries out laser cleaning, and the effect depending on cleaning repeatedly clean back and forth, until
The oxide-film of commissure all removes clean on magnesium alloy workpiece.
2. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 1, it is characterised in that the pulsed light
Fibre laser maximum average power is 200W, and the air mass flow of the compressed-air atomizer is 40-50L/min, the flue dust mistake
The power 0.75KW of filter system.
3. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 1, it is characterised in that the laser shakes
Camera lens, compressed-air atomizer and filtrating smoke dust system suction nozzle are located at same perpendicular.
4. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 3, it is characterised in that described vertical flat
Face is parallel with cleaning direction.
5. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 1, it is characterised in that the laser is clear
Wash in step, set the laser power of pulse optical fiber as 150W, pulse width 25ns, pulse frequency 25KHz, scanning speed
Rate 3500mm/s.
6. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 1, it is characterised in that the laser is clear
Wash in step, set the laser power of pulse optical fiber as 100W, pulse width 20ns, pulse frequency 20KHz, scanning speed
Rate 3000mm/s.
7. surface laser cleaning method before magnesium alloy workpiece weldering according to claim 1, it is characterised in that the laser is clear
Wash in step, set the laser power of pulse optical fiber as 200W, pulse width 30ns, pulse frequency 30KHz, scanning speed
Rate 4000mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478937.3A CN107245724A (en) | 2017-06-22 | 2017-06-22 | Surface laser cleaning method before a kind of magnesium alloy workpiece weldering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478937.3A CN107245724A (en) | 2017-06-22 | 2017-06-22 | Surface laser cleaning method before a kind of magnesium alloy workpiece weldering |
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| CN107245724A true CN107245724A (en) | 2017-10-13 |
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| CN201710478937.3A Pending CN107245724A (en) | 2017-06-22 | 2017-06-22 | Surface laser cleaning method before a kind of magnesium alloy workpiece weldering |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788433A (en) * | 2018-06-26 | 2018-11-13 | 南京速镭激光科技有限公司 | Vacuum electron beam welding method and vacuum electron beam welding system for aluminium alloy |
| CN109877118A (en) * | 2019-03-29 | 2019-06-14 | 华中科技大学 | A kind of laser metal surface decontamination or anti-rotten Rustproofing apparatus and method |
| CN113843221A (en) * | 2021-08-27 | 2021-12-28 | 大连透平机械技术发展有限公司 | Method for removing high-temperature oxidation color of centrifugal compressor impeller |
| CN115255597A (en) * | 2022-06-22 | 2022-11-01 | 上海航天精密机械研究所 | Magnesium alloy surface plasticizing diffusion bonding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108788433A (en) * | 2018-06-26 | 2018-11-13 | 南京速镭激光科技有限公司 | Vacuum electron beam welding method and vacuum electron beam welding system for aluminium alloy |
| CN109877118A (en) * | 2019-03-29 | 2019-06-14 | 华中科技大学 | A kind of laser metal surface decontamination or anti-rotten Rustproofing apparatus and method |
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| CN113843221A (en) * | 2021-08-27 | 2021-12-28 | 大连透平机械技术发展有限公司 | Method for removing high-temperature oxidation color of centrifugal compressor impeller |
| CN115255597A (en) * | 2022-06-22 | 2022-11-01 | 上海航天精密机械研究所 | Magnesium alloy surface plasticizing diffusion bonding method |
| CN115255597B (en) * | 2022-06-22 | 2023-12-12 | 上海航天精密机械研究所 | Magnesium alloy surface plasticizing diffusion connection method |
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Application publication date: 20171013 |